Lesson 3/Learning Event 1
EXPOSE SAMPLER FOR 10 MINUTES,
THEN COMPLETE STEPS USING NO. 4
Step 12. Finger-crush the second green ampoule marked 4 (figure 18). Swing the heater assembly
over the test spot. Vent the vapor away from the operator's body. Leave the hinged heater assembly
in place for one minute.
Step 13. After one minute has passed, swing the hinged heater assembly
away from the test spot (figure 18).